Pipe-driving head.



PATENTED AUG. 4, 1903.

HEAD.

0. H. BUNG PIPE DRIVING APPLICATION FILED A N0 MODEL.

L L L L L L A lll 'tbll' u lgaegfor,

I III/fill!!! No. *rsaeoev UNITED STATES Patented August 4, 1903.

PATENT OFFICE.

ORA H. HUNGER, OF DAVIS, SOUTH DAKOTA.

PlPE-DRlVlNG HEAD.

SPECIFICATION forming part of Letters Patent No. 735,205, dated August4, 1903.

Application filed April 18, 1908- Serial No. 153,290 No model.)

T0 to whom it may concern:

Be it known that I, ORA H. BUNGER, acitizen of the United States,residing at Davis, in the county of Turner and State of South Dakota,have invented a new and useful Pipe- Driving Head, of which thefollowing is a specification.

This invention relates to a device adapted to be used in Artesian wells,where pipe is driven into the earth in sections.

The object-of my invention is to provide means for preventing themutilation of threads on the ends of the pipe due to the contact withthe drive-head or hammer used to force the pipe into the earth.

Another object is to provide a protector which is capable of beingfitted over the threaded end of the pipe in such a manner as to beeasily removable therefrom.

A further object is to provide means for protecting the end of the pipeagainst the blows of the driving medium.

Further objects and advantages of this invention will appear in thefollowing description, and the novel features will be particularlypointed out in the appended claims, it being understood that variouschanges in the form, proportion, and the minor details of constructionmay be resorted to without departing from the spirit or sacrificing anyof the advantages of this invention.

In the drawings, Figure 1 is a vertical longitudinal sectional viewthrough the invention, the pipe being shown in elevation; and Fig. 2 isa sectional view on the line 2 2 of Fig. 1.

The reference-numeral 1 designates a section of piping or tubing such asis ordinarily used in connection with Artesian or oil wells. As is wellknown, the usual method employed in driving the pipe-sections into theearth results in a mutilation of the threads of the uppermostpipe-section or that one receiving the force of impact of the drivingmedium.

It is the purpose of my invention to overcome this objection; and tothis end the invention consists of a cap 2, provided with a conicalflange 3, fitted over the end of the tube and inclosing the freethreaded end thereof. The flange is held upon the tube 1 in any adjustedposition by means of yieldingly-supported engaging members 4:, carriedwithin the flange and held in contact with the tube by the yieldingconnections 5. In actual practice the tubular flange 3 will be flaredtoward one end, within which the yieldingly-supported members 4 will beformed of approximately wedge-shaped concavo-convex instrumentalities,with a frictional engaging surface 6 on the concave portion of eachmember to firmly grasp the tube 1 when the wedges are drawn within thetube. These members 4, which constitute jaws, are disposed in concentricradial series around the tube, and the torsion of the springs 5 willhave a tendency to retract them within the flange, so that any pressureupon the cap 2 will cause the members 4 to more tightly bind upon thetube 1. It will be observed that the cap is held out of contact with theend of the tube, and the force of impact of the blow upon said cap istransmitted to the tube 1, toward the lower end thereof. The advantageof this is that the pipe can be driven into the ground with morefacility than would be possible if the blow were received at the freeend thereof. When the pipe has been driven a sufficient distance intothe ground and it is desirable to applya new section, an upward pull canbe exerted upon the flange 3 and cap, which will permit the springs 5 toexpand, thereby releasing the wedges, so that the entire device can beremoved.

I claim- 1. A tube-shield comprising a cap and yieldingly-supportedmeans carried by the cap for engagement with the tube.

2. A tubeshield comprising a cap and means ad justabl y carried by thecap for engagement with the tube.

3. A tube-shield comprising a cap and means for engagement with the tubeto support the cap out of contact with the tube.

at. A device of the character described com prising a cap, andyieldingly supported wedges carried by the cap.

5. A shield comprising a cap, and frictionally-engaging adjustablesupporting devices for contact with the tube and supported by Intestimony that I claim the foregoing as the cap. my own I have heretoaflixed my signature in 6. The combination with a pipe-section, of thepresence of two witnesses. a cap on one end thereof and inclosing theORA H. BUNGER. 5 pipe end and means for engaging the pipe WVitnesses:

for supporting the cap out of contact with H. M. HESSENIUS,

the pipe end. J. E. WALKER.

